recurrent or persistent pneumonia
TRANSCRIPT
Recurrent or Persistent Pneumonia
Lower Respiratory Tract
Dr T Avenant
Recurrent or Persistent Pneumonia
• Definitions– Recurrent pneumonia
• more than two episodes of pneumonia in 18 months
– Persistent pneumonia• symptoms that do not
clear within 14 days• radiograph that do not
revert to normal within 4-6 weeks
• Most common causes of recurrent pneumonia– PTB– foreign body aspiration– misdiagnosed or
inappropriately treated asthma
– HIV– bronchiectasis
Approach to recurrent pneumonia
• Localize disease– Clinical – X-ray
• Localized disease– most likely a local abnormality of a bronchus or lung
parenchyma– common causes
• TB (glands)• foreign body aspiration• localized bronchiectasis
– bronchoscopy and RT of the lung usually indicated
Approach to recurrent pneumonia
• Widespread disease– immune compromised group
• acquired (AIDS & NAIDS)• congenital immunodeficiency syndromes
– non-immune compromised group• aspiration syndromes• abnormal cough mechanism• abnormal mucus clearance• “fragile lung” after insult
Anatomic localized illness
• Narrowed airway– Extrinsic compression
• Lymph nodes– TB, Lymphoma,
Neoplasm• Vascular ring
– Bronchial wall• bronchomalasia, web,
stricture
– Endobronchial pathology
– Endobronchialpathology(continued)
• foreign body, TB granuloma, neoplasm
• Congenital lung lesions– Bronchogenic cyst– Congenital lobar emphysema– Lung sequestration
• Focal bronchiectasis
Widespread Disease with Immunodeficiency
• Acquired– NAIDS– HIV lung illness
• Bacterial pneumonia, TB, CMV, PCP
• Other opportunistic infections
– Candida albicans– Cryptococcus
neoformans• LIP• Lymphoma / Kaposi
– Immune suppression
• Congenital – B cell defects– T cell defects– Phagocyte defects– Complement defects– Combined defects
Widespread Disease with Normal Immunity
• Allergy– Undiagnosed asthma
(mucus plugs)– Eosinophil pulmonary
infiltrates
• Persisting lung infection - TB
• Recurrent aspiration– Sucking or swallowing
abnormalities– TOF– GOR
• Muco-ciliary clearance defects– CF, Immotile cilia
• Heart lesions– L to R shunting with
increased pulmonary blood flow
• “Fragile” lung– BPD, Post necrotizing
pneumonitis
• Interstitial pneumonitis
Approach to the child with recurrent pneumonia
• Step one– careful history– clinical evaluation
• Step two– localize disease
• clinical examination• CXR
– exclude common causes• TB work-up• foreign body aspiration• asthma• HIV
• Step three– diagnose & treat if possible -
if not– refer for specialist work-up&
treatment• for localized disease
– RT– bronchoscopy most likely
to be done• for widespread illness
– further specialist work-up depending on situation
Suppurative Lung Disease
BronchiectasisLung Abscess
Bronchiectasis
• Permanent destruction of bronchial walls and lung tissue due to chronic infection
• Mechanisms– Bronchial lumen obstruction
• TB glands, foreign body, pertussis– Parenchymal destruction from necrotizing pneumonia
• Bacteria: staphylococci, Klebsiella, anaerobes, tuberculosis• Viruses: measles, adenovirus
– Repeated respiratory infections• Malnourished, cystic fibrosis, generalized
immunodefficiencies, aspiration pneumonia, ciliary diskinesia
Clinical Picture
• History– Repeated visits or admissions with lower
respiratory infections– Productive cough
• Activity• Change in position
– Difficult in children– Haemoptysis rare in children
Clinical Picture
• Examination– Clubbing after + 1 year– Halitosis– Growth retarded– Wide spread crackles
and wheezes– Pulmonary
hypertension and corpulmonale
Diagnosis
• Clinical picture• Chest radiograph
– Non specific or– Area of opacification that fails to resolve– Honey comb appearance (small cysts)– Widespread destruction, fibrosis and loss of
volume• Computed tomography
Differential Diagnosis
Evaluate every patient with bronchiectasis for
• Sinusitis • Ciliary dyskinesis• Immunodeficiency• TB• Asthma• CF
• If not found, bronchoscopy for– Stenosis, strictures,
foreign bodies, tumours
– Bacterial cultures
Treatment
• Prevention– Immunization– Correct treatment of pneumonia– Correct treatment of foreign body inhalation– Early detection and treatment of TB
• Physiotherapy with postural drainage
Treatment
• Appropriate antibiotics• Immunized against influenza• Some benefit from bronchodilators• Surgery if
– Disease progression and– Unilateral– No pulmonary hypertension– Adequate lung function
Lung abscess
• Abscesses follow infection with:– Staphylococcus aureus– Haemophilus influenza– Klebsiella pneumoniae– Mycobacterium tuberculosis– Anaerobic infections– Streptococcus pneumoniae (rare)
• In children most often after aspiration of infected material
Lung abscess
• Clinical picture– Toxic, malaise– High swinging fever– Foul smelling sputum– Respond poorly to antibiotics– Amphoric breathing– CXR: cavity with fluid level
Lung abscess
Treatment
• Postural drainage• Intravenous antibiotics
– Penicillin– Cloxacillin– Aminoglycoside
• Exclude bronchial obstruction• Drainage